21022323120 has 160 divisors (see below), whose sum is σ = 72513216000. Its totient is φ = 5597980416.

The previous prime is 21022323103. The next prime is 21022323151. The reversal of 21022323120 is 2132322012.

21022323120 is a `hidden beast` number, since 210 + 223 + 231 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21022323093 and 21022323102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1598331 + ... + 1611429.

It is an arithmetic number, because the mean of its divisors is an integer number (453207600).

Almost surely, 2^21022323120 is an apocalyptic number.

21022323120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21022323120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36256608000).

21022323120 is an abundant number, since it is smaller than the sum of its proper divisors (51490892880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21022323120 is a wasteful number, since it uses less digits than its factorization.

21022323120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13864 (or 13852 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21022323120 its reverse (2132322012), we get a palindrome (23154645132).

The spelling of 21022323120 in words is "twenty-one billion, twenty-two million, three hundred twenty-three thousand, one hundred twenty".